Balancing of crank shafts



Nav. 25, 1930. CCLENCH 1,783,073

BALANCING OF' CRANK SHAFTS Filed Feb. 26, 1929 Pateated'Nov. 25, i930 A, l i l l `.`-,1,783,0i73

L UNITEDSTATES PATENT QFFICV r Appucation inearebuary aaisee, serial No. 342,750, lu1-1in Great Britamnarch si, 192s.

This invention relates to the balancing of l. A crank shaft comprisingin combinacrank shafts and more particularly to the baltion a series .of sections, flanges on the` ends ancing of crank shafts for use -in automobile of each section, ,bolts connecting the adjacent w work. i flanges ofthe sections together,and balancing i3 According to the invention the weightsv rings, one on each end of the shaftpandone 55 necessary to balance the crank shaft are in the over each flanged joint, saidbalancing rings form of rings or sleeves which are fitted over Vbeing shaped to forni the journal bearings of the shaft at the desired point or points and the shaft. v also form the journal bearing or vbearings of 2. A crank shaft comprising a series o-f lo the Shaft, flanged sections bolted together and balanc- 60 For example, if a crank shaft is made in 0ing ,rings mounted Pn the joints between Sad A i two or more sections, bolted or otherwise se- SGCIOHS 1 and OIIIllIlg the JOUIVIlal bearings cured together, the balancing weights may forth@ Shaft be in the form of rings or sleeves'itted one In GSInOny Wheenf I have Signed my M m at each end of the complete shaft and one over name t0 hlS SPeClCHJlOIl'. i r

each joint between the sections, the said rings j CLENCHL or sleeves being shaped to form the journal i i j Y bearings of the shaft.

The invention is particularly applicable Y j j 29 for use inV connection with a valve operating j i i Y .i 70

` shaft of the wobble type'for internal conibuston engines having slide or sleeve'valves.

The accompanying drawing is a partsectional plan view'of a siX throw crank shaft j i 1 75 2@ of the-wobble type for operating the sleeve l i Y v valves of an internal combustion enginehavv ing the invention applied thereto.

Reference to the drawing, the shaft is w shown as made in three sections A connected 3@ together by bolting to the coupling pieces B. i v l l 8O,

The weights necessary kto balance the shaft are calculated in any suitable manner and `are thendistributed` over the shaft in the W form of sleeves or rings 1, 2 3, 4, the sleeves Y j p 85 ff l, 4 being secured over the ends of the shafts i and the sleeves 2, Sover the section joints as shewn. The sleeves or rings may be shrunk on or secured in any suitable manner and the outer faces of thesleeves are shaped to forni 90 the journal bearings of the shaft. Oil K i grooves such as 5 maybe provided in the sleeves if desired. It will be obvious that the invention may be applied toV shafts formed 5 in any number of sections and the balancing sleeves or rings may be fitted over the ends of some of the sections only if desired. Y Y

Havingthus described the nature of my said invention and the best means I know of 50 carrying. the saine into practical effect, I 

